US PATENT SUBCLASS 335 / 141
.~ With electrothermal-actuating means (e.g., expansible wire)

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
141.~ With electrothermal-actuating means (e.g., expansible wire) {5}
142  DF  .~.~> Fusible element
143  DF  .~.~> Independently operative
144  DF  .~.~> With armature positioning or adjusting
145  DF  .~.~> Bimetallic element
146  DF  .~.~> Thermomagnetic (e.g., device whose magnetic permeability changes with temperature)

DEFINITION

Classification: 335/141

(under subclass 2) Subject matter wherein the subject matter includes the combination of magnetic responsive control means combined with terminal-current responsive means, such as fuses, cut-outs, latching or other means effecting the operation of the device as a result of heating by current flow. Usually, both diversely responsive devices operate upon the same contact actuation or control means. The heating current may comprise the entire current flowing in the controlled circuit or a proportionate part thereof flowing in a shunt circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

31, for thermal controlled latch or trip delay means in automatic circuit interrupters.

35+, for automatic circuit interrupting devices with combined magnetic and thermal current trip means.

39+, for automatic circuit interrupter with magnetic latch or trip including thermal delay means.

43+, for automatic circuit interrupters with thermally actuated latch or trip means.

66, for retarded or delayed type switches with thermal delay means. 156, for switches with protective means responsive to heat.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

3, for multiple circuit control devices with thermal current control means.

219, Electric Heating,

110, for resistance heating systems with current supply responsive to current voltage or temperature and subclasses 510+ for heating systems including automatically controlled switches with thermally responsive means.

236, Automatic Temperature and Humidity Regulation,

68, for systems with relay structure combined with auxiliary heater means.

307, Electrical Transmission or Interconnection Systems,

117, for switching systems responsive to heat.

318, Electricity: Motive Power Systems, 471+, for electric motor systems including automatic control switches with thermal control means for the switch.

337, Electricity: Electrothermally or Thermally Actuated Switches,

14, for nonmagnetically actuated switches which are responsive to heat generated by the current in a protected circuit and subclass 298 for switches which are responsive to heat from an external source.

361, Electricity: Electrical Systems and Devices,

99, for safety and protective systems including combined thermal-electromagnetic relays in a time delay means, and subclasses 160+ for electric circuits for relays and electromagnets with thermal control means.